Tire tread gauge



FIG. 1 is a front elevational view of a tire tread gauge showing my new design with the gauge element in the retracted position;

FIG. 2 is a front elevational view with the gauge element in an extended position;

FIG. 3 is a rear elevational of FIG. 2;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof, and

FIG. 6 is a right side elevational view of FIG. 2, the opposite side being a mirror image thereof. 

The ornamental design for a tire tread gauge, substantially as shown. 